Hey Roy125....
Gotta swing much faster to make a spin serve go in and still have some pace.
Use more conti grip, in your case, more towards easternBACKhand, to get the spin. Change in increments to find the "right" grip for you.
Now swing much faster, hit a few, and aim the next thousand so the ball goes 3' higher than the net. You are definetely NOT swinging upwards right now. You're swinging straight ahead, so net clearance is nil.